GPI Port
The switcher supports 24 GPI I/Os on each female DB25 connector.

| Pin | Signal |
|---|---|
| 1 | GPI I/O 1 |
| 2 | GPI I/O 2 |
| 3 | GPI I/O 3 |
| 4 | GPI I/O 4 |
| 5 | GPI I/O 5 |
| 6 | GPI I/O 6 |
| 7 | GPI I/O 7 |
| 8 | GPI I/O 8 |
| 9 | GPI I/O 9 |
| 10 | GPI I/O 10 |
| 11 | GPI I/O 11 |
| 12 | GPI I/O 12 |
| 13 | GPI I/O 13 |
| 14 | GPI I/O 14 |
| 15 | GPI I/O 15 |
| 16 | GPI I/O 16 |
| 17 | GPI I/O 17 |
| 18 | GPI I/O 18 |
| 19 | GPI I/O 19 |
| 20 | GPI I/O 20 |
| 21 | GPI I/O 21 |
| 22 | GPI I/O 22 |
| 23 | GPI I/O 23 |
| 24 | GPI I/O 24 |
| 25 | Ground |
